新型农药桃小净药效研究

The Experimental Study on Prevention Effect of a New Pestcide Taoxiaojing

对新型农药桃小净药效进行了比较研究 .梨小食心虫是果树的重要害虫 ,分布广 ,危害重 .本试验选用40 %氰久 ,2 0 %甲氰菊酯 ,5 0 %甲胺磷和 30 %桃小净防治梨小幼虫 .结果表明 ,5 0 %甲胺磷和 30 %桃小净 10 0 0和 15 0 0倍溶液具有较强的渗透和内吸作用 ,药效达 76 .81%～ 93.5 8% ,但桃小净使用更为完全 ,在应用中可采用 10 0 0～ 15 0 0倍溶液喷雾防治 .

The prevention effect of a new pestcide Taoxiaojing is studied. Graphlitha molesta busak is the main pest to fruit tree, which is widespread and does a great harm to fruit tree.40% monocrotophos and fenvalerate, 20% fenpropathrin, 50% methamidophos and 30% Taoxiaojing are respectively selected to prevent graphlitha molesra busak here. It is found that 50% methamidophos, 1000 times and 1500 times diluting solution of Taoxiaojing have a stronger permeation and are easily absorbed. The prevention effects amount to 76.81～93. 58%. But the usage of Taoxiaojing is safer than that of other pestcides. In practice 1000～1500 times diluting solution can be used to prevent graphlitha molesta busak by spraying.